I had my period may 4th to may 7th the app says I ovulated may 16th. For the past 5 days I've had painful cramps in my stomach and lower back pain. I don't know what it could be because af isn't due until May 30th ... Mine comes every 26 days. Always on time. We are ttc with 4 child. And have been trying for 5 months now. I'm hoping the cramping means something good. And also been having dreads about bfp tests. The tww is driving me crazy ... I think I ovulated sooner than app says . But if not then today I would be 3dpo but guess I'll have to wait an see if af shows may 30th.